Update credential provider strings to use "work account".

Bug: 934334
Change-Id: Ic100fcfd6a946fa4c7ef4fc9b04d773fd5b70789
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1512305
Reviewed-by: Tien Mai <tienmai@chromium.org>
Commit-Queue: Roger Tawa <rogerta@chromium.org>
Cr-Commit-Position: refs/heads/master@{#639589}
13 files changed